Yarn-tension machine



Patented June 28, 1921.

2 SHEETS-SHEET 1.

L. T. uouemon. mm TENSION MACHINE.

A-PPLIC'ATION HLED IAY 22.- I989.

Pam-ma June-28, 1921.

2 SHEE TS-SHEET 2.

PATENT OFFICE.

LEWIS T. HOUGHTON, OF WORCESTER, MASSACHUSETTS.

YARN-TENSION MACHINE.

. Application filed lday 22, 1919. Serial No. 298,908.

To all whom it may concern:-

Be it known that I, LEWIS T. HoUGH'roN, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have'invented a new and useful Yarn-Tension Machine, of which the following is aspecification. i This invention relates to an improvement ina yarn tension device of the general type shown in my prior PatentNo. 1,303,202, in which type of tension device the yarn is guided between two series of tension memmatter of great difficulty to maintain uniform tension with such wide variations in winding speed. In fact,it is not uncommon to provide speed changing devices in winding machines, as heretofore used, to overcome this difficulty. Furthermore it is im .portant that the device-shall be adapted to yield whenever sudden tension ,is, placed on the yarn, which often occurs when the yarn on the bobbin becomes embedded between otherv adjacent layers of yarn.

1 It is the general object of my present: in-

V vention to I provide improved means. for so applying tension to the yarn ,thatsubstantiallyuniform tensionmay be maintainedlin vary .the tension.

My improved tension means isalsoadaptfedQto hold the tension members vyieldingly in inoperative position when manually moved to; such position.

- Q h rieature of y inve on rel te to 4 wh ch. Will be hereinafter described, and. more; particularly gi ntg l 911; i ithp lap pended claims v an improved supporting stand, and toan a v;ato 2.7,to an car 28 formed onthe bracket 15 and. extends upwardly toengage the cam 24 a at a point below the level of. the axis-ofthe' ,iinprovedformof bobbinsuppo'rt.

. inventi nf rther q nsistsi terta n arrangements and comb nations of parts A preferred form of my invention is shown in the drawings, in which Figure 1 is a side elevation of my improved tension device;

Fig. 2 is a front elevation thereof;

Fig. 3 is a plan view thereof;

Fig. 4 is a side elevation looking in the direction of the arrow 4 in Fig. 2, and

Fig. 5 is a sectional view, showing aslight modification. I

Referring to the drawings, I have indicated. a bobbin B from which the yarn Y is wound by the spool S. My'improved'tension device is mounted on a longitudinally extending bar 10 forming partof a spooling or rewinding machine.

The tension device proper comprises, a stand 11 in which a plurality of guide rods 12 arefixed, being preferably bent downward and extending in parallel relation toward the right, as viewed in Fig. 3. The stand 11 is preferably formed ofxsheet metal with a U-shaped extension 13 on the rear 'sideembracing the supporting rod 10, and

clamped around said rod or bar by a bolt 14.

Abracket 15also preferably formed of sheet metal is secured to the front face of the stand llby a bolt l6 'and nut 17 extending through a slot 18 in the bracket. Forwardly projecting flanges on the stand restrict the bracket to vertical movement only.

A plurality of tension fingers, 19 are mounted in a support 20 fixed to a rod or shaft '21 extending through ears 22 onthe bracket ,15 and havinga I handle portion 23 at the forward end thereof. The lower limit of movement of the tension fingers is determined by theengagement of a portion of the support "20 with some portion of the bracket 15, sluch asthat which supports the cars 22. I V

The support 20 is provided. with a cam portion whichmay bea separatecam plate 24 secured to the support, as shown in Figs. 1 to 4, or whichmay be madebyformingthe support itself in the shape of a cam as shown atj25 inFig. 5. A flat spring26 is secured shaftfll Specification of Letters I atent. Patented June 28, 1921.

so reat 'ireelytlir iig hole firmly against the car 31.

The check nut 32 and also the nut 17 by which the bracket 15 is secured in adjusted position are preferably of irregular'outhne and require a special wrench for ad ustwhen installed in a mill.

As the spring 26 engages the cam 24 at a p'oint 'below the axis of the shaft 21 the spring has a constant tendency to swing the tension fingers 19 downward, and the cam '24 is so designed that the tension of the spring is substantially constant in all operative positions of the tension fingers. v

' When however, the fingers are moved to inoperative position, as shown in dotted lines in Figs. 3, and 5, the end of the spring I 26 engages the under side of the cam 24 and yieldingly holds the fingers in raised position. The operation of the cam shaped support 25, as shown in Fig. 5, isexactly the same as that of the cam 24 shown inFigs. 1

and 4. V V

, I have also shown in thedrawlngs an 1m 7 proved construction of bobbin support comprising a rigid member extending vertically downward'and secured to the stand 11 i by the 'bolt .14 which clamps the stand to the supporting bar 10. The member35 is preferably formed of sheet metal and of V substantially U-shaped cross section and the side flanges thereof closely embrace'the depending U -shaped portion 13 of the stand 11, thus preventing lateral movementof the f member 35' relative thereto. I

One. of the flanges 36 of the ,part 35 00, n my prior application Serial No. 108,063,

increases in width at its lower end and is provided with a vertical slot 37. A horizon- 45 36 by a bolt 39, said arm being provided with a horizontal portion 40 upon which a H dead spindle 41 ismounted. The spindle 41 tally slotted arm 38 is clamped to the flange is provided with a head 42 firmly seated uponfthe portion'40 by a spring 43 contained in a cap 44 having downwardly extended lugs by which it is clamped to the portion 40, as shown in Fig.3. v V The cap 44 is slotted at 45 to permit the spindle 41 to be swung forward or to the left as viewed in Fig. 1 for easy insertion or removal of the bobbinB. No claims are made. to the structure of the dead'spindle in this application, as claims coveringsaid structure have been heretofore presented 1n filed July 7, 1918. Having will be; seen that, I have providedfla; yarn te si n evi e f Simple an dura le 9.

struction and that I have provided'an extremely efiicient means for applying tension V to the fingers 19 and for ad usting the tension to suit varying conditions. I have foundin practice that this tension device a I and I have foundthat the tenslon is subment. This prevents unnecessary and ina'ccurate adjustments by unauthorlzed persons stantially unchanged whether either the bobbin or the spool is substantially full or substantially empty, and also whether the bobbin is. warp wound or filling wound.

Having thus described my invention, it

will be evident that changes and modifica tions can be made therein by those skilled from each "other to secure a desired normal tension and a means independent of said adjustment whereby increase of tension onthe. yarn automatically and substantially reduces the normal tension space between-the guides; while maintaining the tension substantially unchanged, substantially as described.

A yarn tension device comprising two series of tenslon members ad ustable toward r and away from each other and means 1nde-- pendent of said adjustment to maintain normal tension on the yarn while permitting, substantial changes in 4, the relative separat on of SQ IClIHGIHbQI S i 3. A yarn tension device for 'spooling yarn, having lIl combination, two series of tension gu des, one of said series being plvottally mounted and adjustable toward and from the other series, andv means independent of said adjustment'for yieldingly-holding the pivoted series in a position to furnish the desired yarn tension but permitting said yarn while maintaining substantially uniform yarn tension.

series of guides to automatically and" sub-' 4. yarn tension device, comprising a I plurality of fixed guide rods, a plurality of tension fingers mounted upon a pivoted support and alternatingftherewith, and means to apply yielding tension to said fingers, said means comprlslng a spring having c0nt1nu-' ous sliding engagement with a portion of said support below the iaxisthereof and effective tofyi eldingly'; and substantially uniformly resist, displacement of said fingers ffronr their lowermost position. i thus described'my invention, it

5. A yarn tension device, comprising a port and alternating therewith, and means to apply yielding tension to said fingers, said means comprising a cam-shaped portion of said support, and a spring engaging said portion to yieldingly depress said fingers.

6. A yarn tension device, comprising a plurality of fixed guide rods, a plurality of tension fingers mounted upon a pivoted support and alternating therewith, and means to apply yielding tension to said fingers,said means comprising a cam-shaped portion of said support, a flat spring engaging said portion, and means to adjust the tension of said s ring.

7. yarn tension device, comprising a plurality of fixed guide rods, a plurality of tension fingers mounted upon a pivoted support and alternating therewith, and means to apply yielding tension to said fingers, said means comprising a spring continuously engaging a portion of said support below the axis'thereof and normally acting to yieldingly resist displacement of said fingers from their lowermost position, the action of position, and a spring engaging said cam' portion below said axis.

9. A yarn tension device, comprising a plurality of fixed; guide rods, a plurality of tension fingers mounted upon a pivoted support and alternating therewith, and means to apply yielding tension to said fingers, said means comprising a cam-shaped portion on said support, a fiat spring fixed at one end and engaging said portion at the other end, and an adjusting screw engaging said spring at an intermediate portion thereof.

10. In a yarn tension device for a machine having .a longitudinally extended supporting bar, in combination, a plurality of fixed and movable tension members, a stand on which said members are mounted, said stand having a U-shaped attaching portion and means to clamp said portion of said stand about the supporting bar.

11. A yarn tension device, comprising a stand, a plurality of fixed and movable tension members mounted thereon, a depending bobbin support, said stand having a depend ing portion fitting between the sides of said support to preserve the lateral alinement thereof, and a single fastening device adapted to secure said bobbin support to said stand and to clamp said stand to a supporting bar.

12. A yarn tension device comprising two series of tension members, means permitting adjustment of said members to provide a normal space between said series, one of said series being movable independent of said adjustment a substantial distance toward the other series to relieve increased yarn pull, and means to maintain substantially uniform tension on said movable series in every operative position thereof.

In testimony whereof I have hereunto affixed my signature.

LEWIS T. HOUGHTON. 

